Question 1

If a magnet produces a force on a current-carrying wire, the wire

Accepted Answer

A)  produces a force on the magnet.
B)  may or may not produce a force on the magnet.
C)  none of theseD) B) and C)
E) All of the above

Question 2

Magnetic fields are produced by

Accepted Answer

A)  a tiny fraction of moving electrical charges.
B)  most moving electrical charges.
C)  all moving electrical charges.D) B) and C)
E) None of the above C

Question 3

When an electron passes through the magnetic field of a horseshoe magnet, the electron's

Accepted Answer

A)  speed is increased.
B)  direction is changed.
C)  both of these
D)  neither of theseE) A) and D)
F) None of the above

Question 4

Magnetic field strength about a magnet is strongest where magnetic field lines are

Accepted Answer

A)  closer together.
B)  straightest.
C)  most curved.
D)  more spread.E) None of the above
F) B) and D)

Question 5

The direction of the force exerted on a moving charge in a magnetic field is

Accepted Answer

A)  in the direction of the motion.
B)  opposite its motion.
C)  at right angles to the direction of the motion.D) A) and C)
E) A) and B)

Question 6

The end of a compass needle that points to the south pole of a magnet is the

Accepted Answer

A)  north pole.
B)  south pole.
C)  both of theseD) All of the above
E) A) and B) A

Question 7

No net force acts on a loop of wire in a magnetic field when

Accepted Answer

A)  no current is in the loop.
B)  no magnetic field lines pass through the loop.
C)  both of these
D)  neither of theseE) A) and B)
F) None of the above

Question 8

Magnetism is due to the motion of electrons as they

Accepted Answer

A)  move around the nucleus.
B)  spin on their axes.
C)  both of these
D)  neither of theseE) A) and D)
F) B) and D)

Question 9

A compass needle in a magnetic field

Accepted Answer

A)  experiences a torque.
B)  experiences a pair of torques.
C)  may experience a pair of torques.D) A) and B)
E) A) and C)

Question 10

Wood does not have magnetic properties because it contains no

Accepted Answer

A)  iron or other metals.
B)  magnetic domains.
C)  moving electrons.
D)  none of the aboveE) B) and D)
F) None of the above

Question 11

Magnetic domains normally occur in

Accepted Answer

A)  copper.
B)  silver.
C)  iron.
D)  all of the above
E)  none of the aboveF) A) and C)
G) B) and D)

Question 12

A beam of electrons passing through a magnetic field experiences maximum deflection if the direction of the beam is

Accepted Answer

A)  parallel to the field lines.
B)  perpendicular to the field lines.
C)  none of theseD) A) and C)
E) None of the above

Question 13

A current-carrying wire in a magnetic field

Accepted Answer

A)  may be deflected.
B)  may experience a force.
C)  both of these
D)  neither of theseE) A) and C)
F) C) and D)

Question 14

As the number of loops in a current-carrying wire is increased, the

Accepted Answer

A)  more spread out is the magnetic field.
B)  stronger the enclosed magnetic field.
C)  weaker the current.
D)  greater the back emf.E) B) and C)
F) All of the above

Question 15

Which force field can increase a moving electron's speed?

Accepted Answer

A)  electric field
B)  magnetic field
C)  both of these
D)  neither of theseE) B) and D)
F) None of the above

Question 16

Surrounding every moving electron is

Accepted Answer

A)  a magnetic field.
B)  an electric field.
C)  both of these
D)  neither of theseE) B) and D)
F) C) and D) C

Question 17

Whereas electric charges can be isolated, magnetic poles

Accepted Answer

A)  can also.
B)  cannot.
C)  gather in clusters.
D)  none of the aboveE) A) and D)
F) B) and D)

Question 18

An iron rod becomes magnetic when

Accepted Answer

A)  opposite ions accumulate at each end.
B)  its atoms are aligned.
C)  the net spins of many of its electrons are aligned.
D)  its electrons stop moving and point in the same direction.
E)  none of the aboveF) C) and D)
G) C) and E)

Question 19

The force that acts between a pair of magnetic poles depends on

Accepted Answer

A)  magnetic pole strength.
B)  separation distance.
C)  both of these
D)  neither of theseE) A) and D)
F) B) and C)

Question 20

Refrigerator magnets are typically

Accepted Answer

A)  short range.
B)  long range.
C)  none of theseD) A) and B)
E) A) and C)

Exam 24: Magnetism

If a magnet produces a force on a current-carrying wire, the wire

Correct AnswerverifiedShow Answer

Magnetic fields are produced by

Correct AnswerverifiedC

When an electron passes through the magnetic field of a horseshoe magnet, the electron's

Correct AnswerverifiedShow Answer

Magnetic field strength about a magnet is strongest where magnetic field lines are

Correct AnswerverifiedShow Answer

The direction of the force exerted on a moving charge in a magnetic field is

Correct AnswerverifiedShow Answer

The end of a compass needle that points to the south pole of a magnet is the

Correct AnswerverifiedA

No net force acts on a loop of wire in a magnetic field when

Correct AnswerverifiedShow Answer

Magnetism is due to the motion of electrons as they

Correct AnswerverifiedShow Answer

A compass needle in a magnetic field

Correct AnswerverifiedShow Answer

Wood does not have magnetic properties because it contains no

Correct AnswerverifiedShow Answer

Magnetic domains normally occur in

Correct AnswerverifiedShow Answer

A beam of electrons passing through a magnetic field experiences maximum deflection if the direction of the beam is

Correct AnswerverifiedShow Answer

A current-carrying wire in a magnetic field

Correct AnswerverifiedShow Answer

As the number of loops in a current-carrying wire is increased, the

Correct AnswerverifiedShow Answer

Which force field can increase a moving electron's speed?

Correct AnswerverifiedShow Answer

Surrounding every moving electron is

Correct AnswerverifiedC

Whereas electric charges can be isolated, magnetic poles

Correct AnswerverifiedShow Answer

An iron rod becomes magnetic when

Correct AnswerverifiedShow Answer

The force that acts between a pair of magnetic poles depends on

Correct AnswerverifiedShow Answer

Refrigerator magnets are typically

Correct AnswerverifiedShow Answer

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C

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A

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C

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